pstore: add pstore unregister
pstore doesn't support unregistering yet. It was marked as TODO.
This patch adds some code to fix it:
1) Add functions to unregister kmsg/console/ftrace/pmsg.
2) Add a function to free compression buffer.
3) Unmap the memory and free it.
4) Add a function to unregister pstore filesystem.
Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Kees Cook <keescook@chromium.org>
[Removed __exit annotation from ramoops_remove(). Reported by Arnd Bergmann]
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 3adcc46..3586491 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -178,6 +178,7 @@
}
static const struct file_operations pstore_file_operations = {
+ .owner = THIS_MODULE,
.open = pstore_file_open,
.read = pstore_file_read,
.llseek = pstore_file_llseek,
@@ -456,6 +457,7 @@
}
static struct file_system_type pstore_fs_type = {
+ .owner = THIS_MODULE,
.name = "pstore",
.mount = pstore_mount,
.kill_sb = pstore_kill_sb,
@@ -479,5 +481,12 @@
}
module_init(init_pstore_fs)
+static void __exit exit_pstore_fs(void)
+{
+ unregister_filesystem(&pstore_fs_type);
+ sysfs_remove_mount_point(fs_kobj, "pstore");
+}
+module_exit(exit_pstore_fs)
+
MODULE_AUTHOR("Tony Luck <tony.luck@intel.com>");
MODULE_LICENSE("GPL");